Suppose that a compound "x" can be made from the reaction of two other compounds, "a" and "z". A. write a balanced equilibrium expression for this reaction. B. write an expression for the equalibrium product, K, for this reaction. C. If K = 10, what is the ratio of reactants to products at equalibrium? D. Explain the effect on the equalibrium of: 1. adding reactant z. 2. adding reactant a. 3. adding a catalyst.